Streptococcus Pyogenes

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Transcript of Streptococcus Pyogenes

Streptococcus Pyogenes By: Romina Saramout Small round balls, called Cocci. Less then 2 µm in length. Fun Facts! They are Gram-positive -> have a thick protein layer on their cell wall and will stain purple (a way of classifying bacteria)They do not have an endosporesCause mild illnesses: strep throat and impetigoCause severe illnesses: scarlet fever, glomerulonephritis, and necrotizing fasciitis THE END! Cell Type Prokaryotic cell Reproduction Binary Fission Streptococcus Pyogenes Physical Characteristics Habitat DomainKingdomPhylumClassOrderFamilyGenusSpecies Nutrition Heterotrophs BacteriaBacteriaFirmicutesBacilliLactobacillalesStreptococcaceaeStreptococcusPyogenes Lacks a nucleusSingle, circular chromosomeLacks membrane bound organelles A sexual reproductionSingle parent that splits itself into identical copies of itself Life Cycle Mesophiles Streptococcus pyogenes live in habitats with moderate conditions and temperaturesMinimum: 20° CMaximum: 40° CGrowth: 37° CAffects: Humans, fish, cows, etc.Blood and blood streamStarts off on skin or in throat Takes material from environment or eats other organismsSometimes eats flesh, if infection is severe -> attaches to mucus and feeds off membrane on throat Chemohetertrophs Uses energy released from chemical reactions -> ammonia, hydrogen sulphide, etc. They are attached in a long line (chain), called Strepto_. They are greater then 0.5 mm in size. Anaerobic Can live with or without oxygen Streptococcus Pyogenes has a protein called protein F, which is a fibronectin binding protein that allows it to bind to the epithelial cells. By binding to the epithelial cells, the organism is able to stick to the cells of the host tightly, and not leave.The M protein, allows it to resist phagocytosis -> allows cells to grab vital nutrients and protects body of host from harmful bacteria (vital for survival)Hyaluronic acid capsule binds CD44 on epithelial cells